Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
  • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
  • H04N21/44213—Monitoring of end-user related data
  • H04N21/44222—Analytics of user selections, e.g. selection of programs or purchase activity
  • H04N21/44224—Monitoring of user activity on external systems, e.g. Internet browsing
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04H—BROADCAST COMMUNICATION
  • H04H40/00—Arrangements specially adapted for receiving broadcast information
  • H04H40/18—Arrangements characterised by circuits or components specially adapted for receiving
  • H04H40/27—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
  • H04H40/90—Arrangements characterised by circuits or components specially adapted for receiving specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95 specially adapted for satellite broadcast receiving
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B7/00—Radio transmission systems, i.e. using radiation field
  • H04B7/14—Relay systems
  • H04B7/15—Active relay systems
  • H04B7/185—Space-based or airborne stations; Stations for satellite systems
  • H04B7/18523—Satellite systems for providing broadcast service to terrestrial stations, i.e. broadcast satellite service
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
  • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
  • H04N21/25866—Management of end-user data
  • H04N21/25883—Management of end-user data being end-user demographical data, e.g. age, family status or address
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
  • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
  • H04N21/25866—Management of end-user data
  • H04N21/25891—Management of end-user data being end-user preferences
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
  • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
  • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
  • H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
  • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
  • H04N21/4383—Accessing a communication channel
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
  • H04N21/47—End-user applications
  • H04N21/475—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data
  • H04N21/4755—End-user interface for inputting end-user data, e.g. personal identification number [PIN], preference data for defining user preferences, e.g. favourite actors or genre
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
  • H04N21/65—Transmission of management data between client and server
  • H04N21/654—Transmission by server directed to the client
  • H04N21/6543—Transmission by server directed to the client for forcing some client operations, e.g. recording
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
  • H04N21/65—Transmission of management data between client and server
  • H04N21/658—Transmission by the client directed to the server
  • H04N21/6582—Data stored in the client, e.g. viewing habits, hardware capabilities, credit card number
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
  • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
  • H04N21/81—Monomedia components thereof
  • H04N21/812—Monomedia components thereof involving advertisement data
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
  • H04N7/00—Television systems
  • H04N7/16—Analogue secrecy systems; Analogue subscription systems
  • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
  • H04N7/17309—Transmission or handling of upstream communications
  • H04N7/17318—Direct or substantially direct transmission and handling of requests

Definitions

• the present invention relates to the transmission and presentation of data over a data broadcasting system. More particularly, the present invention relates to a method and apparatus for tailoring the delivery of specific data over a data broadcasting system to specially targeted audiences.
• Satellite broadcasting differs from other transmission methods in many ways, one of which is that satellite signals reach a far larger geographical area than programming signals originating from, for example, a local cable television system operator or broadcast station.
• satellite television system operators generally provide services to entire geographical regions.
• these broadcasting methods allow television program providers, and data providers in general, to reach a large audience through a single data transmission, there are disadvantages associated with the use of such methods.
• One disadvantage of terrestrial broadcasting methods is that although television programming and other data can be targeted to particular audiences delineated by local geography, audiences may not be targeted by, for example, their ethnic backgrounds or viewing preferences. Satellite broadcasting is even more disadvantageous in this respect, as television programming and other data cannot be targeted to particular audiences delineated by any means, as the bandwidth necessary for targeting even by local geography would be cost prohibitive utilizing satellite transmissions.
• an advertiser can only restrict its advertisements via television to its local operating area.
• that same advertiser is even more inhibited, as the finest granularity heretofore efficiently available to satellite advertisers was a single large metropolitan area, such as New York City.
• the television viewing audience expands both in number and geographically, advertisers wishing to reach specially targeted audiences find themselves unable to target only the desired viewers.
• advertisers desiring any level of granularity are limited to the use of local broadcasting and other terrestrial systems to reach local geographic audiences.
• this has required either a dynamic, inefficient adjustment in the bandwidth provided by the broadcast system operator, in which case the additional bandwidth required is taken away from some other existing service thereby degrading its performance, constant use of a higher bandwidth for both regular data content and specialized data content, in which case excess bandwidth is wasted on the regular data content, or the constant use of the lower bandwidth acceptable for regular data content, in which case the quality of the specialized data content suffered.
• the present invention addresses the above disadvantages by providing a system and method for broadcast system operators to target specialized data, for example, advertisement programming, to pre-selected audiences.
• the present invention further provides broadcast system operators with a system and method to satisfy demands for higher bandwidth or higher data rates while transmitting specialized data, in an efficient, cost-effective manner.
• user classifications are obtained for a plurality of data users. These user classifications are based on a predetermined set of criteria indicative of the preferences of the data users. The classifications for a predetermined data content are also obtained.
• classifications are based on a second predetermined set of criteria, which may, but need not be, the same as the first set of criteria, indicative of the preferences of the users to which the predetermined data content is directed.
• the predetermined data content and the regular data content are broadcast to multiple user reception units over separate broadcasting services.
• the user reception units are configured to receive and present the data to the users.
• a means for indicating when the user reception units are to automatically switch from the presentation of said regular data content to the presentation of said predetermined data content, and vice versa, is also broadcasted to the plurality of user reception units.
• the means is configured in accordance with the user classifications and the content classifications.
• user classifications are not obtained for the plurality of users before broadcast of the predetermined data content and the regular data content over separate broadcasting services.
• the means for indicating when the user reception units are to automatically switch from the presentation of the data content to the presentation of the predetermined data content, and vice versa is configured only in accordance with the content classifications .
• neither user classifications nor content classifications are obtained prior to broadcast of the predetermined data content and the regular data content over separate broadcasting services.
• the means for indicating when the user reception units are to automatically switch from the presentation of the data content to the presentation of the predetermined data content, and vice versa is configured by the system operator in accordance with predetermined criteria, including for example, the demands of the creator of the predetermined data content.
• viewer classifications are obtained for a plurality of television viewers. These viewer classifications are based on a predetermined set of criteria indicative of the viewing preferences of the viewers, and may illustratively include the age, gender, and preferred language of the viewer.
• the classifications for a predetermined programming content, such as advertising are also obtained. These classifications are also based on the predetermined set of criteria indicative of viewing preferences, and generally indicate the viewer classifications of the television viewers to which said advertising content is directed.
• the mapping table indicates when the individual reception units are to automatically tune to the predetermined programming content, such as advertising, from the regular programming television content.
• the mapping table is configured in accordance with the viewer classifications and the predetermined programming content classifications so that each viewer views the predetermined programming content that substantially matches that viewer's classifications.
• FIG. 1 depicts a viewing environment for one illustrative data broadcasting system, a satellite television system
• FIG. 2 depicts the use of a separate advertising channel to provide advertising content to viewers of regularly scheduled programming on regular television programming channels
• FIG. 3 depicts an exemplary Digital Video Broadcasting syntax for establishing an advertisement map table. DETAILED DESCRIPTION OF THE INVENTION
• FIG. 1 discloses a viewing environment for an illustrative data broadcasting system, and in particular, a satellite television broadcasting system. As shown in FIG.
• Satellite interface units 108 are known in the art, and are generally found in the form of a television set- top unit.
• One illustrative example of such a set-top unit is the Irdeto Digital Video Broadcast Satellite Integrated Receiver/Decoder, manufactured by Hyundai Electronics America.
• Satellite interface unit 108 is connected to, and between, television 106 and satellite receiver 104. Satellite receiver 104 receives television and other signals from a remote satellite 102 and forwards these signals to interface unit 108.
• Interface unit 108 then displays the signals, often in the form of television programming, on television 106.
• Interface unit 108 may also perform additional functions, such as decompression or decoding/encoding of the television programming, and may include one or more removable and/or non-removable electronic storage means.
• Interface unit 108 also includes a means for accepting viewer commands, such as to change television channels, from interface unit remote control 110.
• remote control 110 is merely one means by which a viewer 112 may input commands to interface unit 108.
• viewer 112 may input commands directly into the set-top unit 108.
• set-top unit 108 may include a means for displaying an Electronic Program Guide ("EPG") , said EPGs being well known in the art. If such an EPG is provided, the viewer may input commands into the set-top unit utilizing the EPG.
• EPG Electronic Program Guide
• a system and method for targeting specialized programming to pre-selected viewers utilizing the viewing environment disclosed in FIG. 1.
• the specialized programming content described herein could be any form of information or data and not exceed the scope of the invention.
• the specialized programming content illustratively could be information from particular internet websites, specific regular television programming, or a particular specialized subset of regular television programming, such as news in a particular language.
• satellite television system operator 100 first classifies, or obtains the classification of, each viewer in the viewing population based on, for example, their viewing preferences.
• Possible preference criteria illustratively include, among others, when the viewer most often watches television; age, gender, preferred language, or economic class of the viewer; viewer lifestyle (e.g., particular leisure activities, hobbies, or travel) ; or regular or preferred programming type of the viewer (e.g., sports, movies, or children's shows) .
• one means of obtaining viewers' preferences is through a procedure whereby system operator 100 programs interface unit 108 to present, and interface unit 108 presents, choices among pre-determined selection criteria to viewer 112. Viewer 112 selects those criteria, using remote control 110, that are most desired or most applicable. Once viewer 112 has selected the desired criteria, this information may be stored in interface unit 108 for later use, or alternatively, may be forwarded, for by example, by modem to satellite television system operator 100. Of course, not every viewer 112 may choose to enter selection criteria. Thus, for these viewers, default values may be assigned by operator 100.
• Another acceptable method of obtaining a viewer's preferences is to monitor that viewer's viewing activities and determine the viewer's preferred categories of programming. Such a method is disclosed in U.S. Application No. , entitled “Method and Apparatus for creating a Television Viewer Profile” and filed on November 15, 1996, which is incorporated herein by reference.
• the viewer's preferences may be stored in interface unit 108. More particularly, the preferences may be stored in well known non-volatile memories in interface unit 108, including, among others, EPROMs, EEPROMs, flash memories, or smart cards.
• interface unit 108 is capable of storing preferences for more than one viewer. Accordingly, when a particular viewer is viewing a satellite television broadcast, the specialized programming content, such as advertising, can be tailored for that individual viewer.
• the above-described procedure may also include a means for allowing viewers to change or remove their preferences. Once the total viewing population has been classified based on, for example, their viewing preferences, the specialized programming content must likewise be classified.
• This classification is effected with the audience in mind that the creator of the programming content, such as an advertiser, is targeting, and may be performed either by the advertisers, who then forward the classifications on to operator 100, or by operator 100, based on, for example, the advertiser's input or desires.
• Possible classification criteria for the specialized programming content illustratively include the same criteria used to classify viewers' preferences. For example, certain advertisements may be designed for viewing in conjunction with prime-time news programs. Others may be targeted at the elderly, viewers that speak a particular language, or viewers of a particular economic class. However, it will be recognized that the criteria for classifying the viewers and the specialized programming content need not be the same criteria, in which case, the differing criteria for each group would simply need to be matched or mapped to the corresponding criteria for the other group.
• one aspect of the present invention is the enablement of finer granularity in mapping specialized programming content to the appropriate audience, due to the corresponding classification of viewers' preferences as well as the specialized programming content, thereby reaching the viewers with the most interest in that programming content.
• the specialized programming content is transmitted to viewer satellite receivers 104 on a separate satellite transmission channel than the regularly scheduled programming content (in this context, "channel” illustratively refers to a unique digital service as defined within the Digital Video Broadcasting (DVB) standards published by the European Telecommunication Standards Institute (“ETSI”)).
• channel illustratively refers to a unique digital service as defined within the Digital Video Broadcasting (DVB) standards published by the European Telecommunication Standards Institute (“ETSI”)
• DVB Digital Video Broadcasting
• ETSI European Telecommunication Standards Institute
• This novel use of a separate specialized channel is advantageous for a variety of reasons. For example, by devoting a separate channel solely to specialized programming content, such as advertising, satellite system operator 100 can allocate a higher bandwidth to this channel to ensure higher video quality for all such specialized programming, and avoid the problems associated with the dynamic re- allocation of bandwidth whenever such material is to be aired.
• multiple interface units 108 may be simultaneously tuned to the specialized programming channel.
• This capability leads to obvious efficiencies in bandwidth usage, as, for example, the same advertisement need not be broadcast over multiple channels.
• the broadcast bandwidth that is freed up due to this efficient use of a dedicated advertisement channel may be utilized by satellite system operator 100 to generate additional revenues by transmission of opportunistic data over the multiple unused channels.
• the bandwidth can be used to deliver to viewers time insensitive data such as electronic mail or software.
• the freed up bandwidth can also be provided by satellite system operator 100 to select customers so that these customers may transfer data to selected audiences.
• System Synchronization Implementation of this novel system and method in accordance with the invention requires synchronization at the operator system level as well as some added sophistication in content scheduling.
• the operator may, as previously mentioned, categorize, or obtain the categorization of, all specialized programming content based on the target audience. This task is made even more difficult by the fact that the specialized programming may belong to more than one category (one such example would be an advertisement that targets German speaking children at prime time) .
• the operator may, as also previously mentioned, categorize the viewing audience.
• a time for delivery of each specialized program must be determined and the specialized program must be scheduled for transmission on the appropriate dedicated channel or channels at the determined time.
• scheduling will be easily determined.
• a specialized program has been categorized based- on other criteria, such as language or lifestyle, the determination by operator 100 is more difficult.
• these viewers' interface units 108 must be instructed to automatically tune to the appropriate specialized channel at the correct time. This involves transmitting service information and program specific information to the interface unit 108 at pre-scheduled times.
• service and program specific information are defined in the DVB standards, and provide schedule and service information relating to the actual program information being transmitted. For example, information necessary for interface unit 108 to display an EPG can be transmitted via service and program specific information. The information provided by the service information and program specific information is necessary in order to allow interface unit 108 to correctly change to and from the dedicated specialized programming channel.
• mapping tables containing information mapping viewer preferences against the specialized programming channel or channels, and the time and duration of specialized programming breaks, must be supplied to the interface units. These novel mapping tables are described in detail below.
• the transmission of regularly scheduled television programming on regular programming channels must be synchronized to stop and start in correlation with the transmission of scheduled specialized programming on the specialized programming channel, and any transmission of opportunistic data over the regular television programming channels must be synchronized to start and stop with the transmission of the specialized programming.
• interface units 108 must be equipped with the appropriate hardware and software to receive, interpret, and act on the information contained in the broadcasted service information, program specific information, and mapping tables.
• FIG. 2 illustratively depicts the synchronization of advertising and regularly scheduled television programming in accordance with the invention.
• advertising channel 200 delivers advertisements that have been categorized according to language.
• Regularly scheduled television programming is also delivered over multiple channels, illustratively grouped according to language.
• Spanish language channels SI through S5 (collectively the Spanish language channels 202) carry programming in the Spanish language
• English language channels El through E7 (collectively the English language channels 204) deliver programming in the English language. Note, however, that these channels do not have to be sequentially numbered, nor do they have to be physically co-located in the network. Grouping, for the purpose of carrying out the novel system and method disclosed herein, may instead be abstracted to a higher layer.
• the interface units for viewers tuned to Spanish channels 202 automatically tune to advertising channel 200.
• the collective tuning of all interface units tuned to Spanish channels 202 to advertising channel 200 is depicted in FIG. 2 by arrow 206.
• the same interface units automatically tune back to the respective channel of Spanish channels 202 that had been tuned to before first pre- scheduled time 210, and resume decoding of the interrupted programming. This collective tuning of the interface units back to the appropriate Spanish channels of Spanish channels 202 is depicted in FIG. 2 by arrow 207.
• the interface units for viewers tuned to English channels 204 automatically tune to advertising channel 200.
• the collective tuning of all interface units tuned to English channels 204 to advertising channel 200 is depicted in FIG. 2 by arrow 208.
• the same interface units automatically tune back to the respective channel of English channels 204 that had been tuned to before third pre-scheduled time 214.
• This collective tuning of the interface units back to the appropriate English channels of English channels 204 is depicted in FIG. 2 by arrow 209.
• opportunistic data may be provided over the unused bandwidth, depicted by dashed lines in FIG. 2, of Spanish channels 202 and English channels 204, respectively.
• the tuning described herein is preferably performed internally by the interface units.
• the viewers need not change channels, nor do the viewers even know the channel changes are occurring.
• both the regularly scheduled programming content and the specialized programming content is being aired in their language of choice on the channel to which they have personally tuned.
• the interface unit 108 will first automatically determine, via the mapping table described herein, whether that channel is broadcasting a regularly scheduled television event or has instead been mapped out to an specialized programming channel. Based upon this determination, interface unit 108 will tune to the appropriate channel. If indeed, the new channel is mapped to a specialized programming channel at that particular time, interface unit 108 will determine the parameters of the regular channel so that it can tune back to that channel at the end of the specialized programming break.
• each interface unit should always be aware of the wall clock or real time, such as the local time or Greenwich Mean Time.
• TTT Time and Date Tables
• these snapshots are transmitted to interface units at least once every 30 seconds and al-low interface units to determine and maintain their correct local time from the universal time clock.
• other methods of allowing the interface units to identify the proper time at which to tune to the advertisement channels, such as electronic prompts from system operator 100 may be utilized.
• mapping tables will broadcast mapping tables to each viewer interface unit 108 via satellite 102.
• These mapping tables map specialized data content to be transmitted on particular channels to particular viewers, based on viewer and advertisement classifications.
• these mapping tables comprise advertisement mapping tables that indicate to appropriate viewer interface units 108 to automatically tune to the appropriate advertisement channels at pre-scheduled times.
• the tables are received and stored by interface units 108 preferably in non-volatile memory, and should span an appreciable length of time, illustratively several hours, to reduce the number of times said tables need be transmitted.
• the tables must be transmitted with sufficient regularity to quickly provide the necessary information to interface units that become operational in between advertisement map table transmissions.
• the information in the advertisement mapping tables may first be sorted by viewer preference categories (e.g., age or programming category). Within each viewer preference category, information may sorted by, for example, language preference (e.g., Spanish or English). Within each language preference, information may be sorted by channel. For each channel, the advertisement map table will contain several hours of advertisement information consisting of an identification of each advertisement, the time it will be transmitted, the advertisement channel it will be transmitted on, and the duration of the advertisement.
• viewer preference categories e.g., age or programming category
• information may sorted by, for example, language preference (e.g., Spanish or English).
• language preference e.g., Spanish or English
• information in each language preference e.g., information may be sorted by channel.
• the advertisement map table will contain several hours of advertisement information consisting of an identification of each advertisement, the time it will be transmitted, the advertisement channel it will be transmitted on, and the duration of the advertisement.
• advertisement mapping tables are not defined in current DVB standards, but that they can be easily constructed using current
• mapping tables are configured only in accordance with the specialized data content classifications.
• the mapping tables would indicate that if an advertisement is classified and thus scheduled for prime time television in San Jose, California, all interface units in San Jose, California, regardless of particular viewer preferences, would be instructed by the mapping tables to tune to the appropriate advertising channel at the appropriate time.
• neither user classifications nor specialized content classifications are obtained prior to broadcast of the specialized data content and the regular data content over separate broadcasting services.
• the mapping tables are configured by the system operator in accordance with other criteria, including for example, the demands of the creator of the specialized data content or the availability of time slots for transmitting specialized data content.
• the system operator can configure the mapping tables to instruct certain interface units to switch to the specialized data content at the available times.
• FIG. 3 provides an exemplary embodiment of an advertisement map table constructed using primarily DVB syntax.
• the advertisement map table is comprised of a number of fields, each of which is a certain number of bits in length.
• the number of bits for each field shown in FIG. 3 is merely illustrative, and one skilled in the art will understand that the number of bits for each particular field may be varied.
• While several fields of the advertisement map table shown in FIG. 3 are not currently part of the DVB standard, several of the fields are currently part of the DVB standard and may be used to construct the advertisement map table. Moreover, one skilled in the art will understand that those fields that are not currently part of the DVB standard are similar to and derived from current DVB defined fields. What follows is a listing and description of some of the fields in the advertisement map table according to the invention. Use of fields disclosed in FIG. 3, but not listed below, is well known in the art and need not be further described herein.
• table_id Specific values assigned within the DVB standard cannot be used. Therefore, only "user-defined" values under the DVB standards may be used.
• advertisement_preference_i Identifies the advertisement preference (s) for each interface unit. A unique value is utilized to indicate no preference.
• ISO_659_language_code Identifies the language of the advertisement content.
• service_id Differentiates the service for which the advertisement map is being defined from any other services within a transport stream.
• transport_stream__i differentiates the service for which the advertisement map is being defined from any other multiplex in the delivery system
• ad_event_id Identifies the advertisement event, which will be unique for a given ad_service_id (see below) .
• ad_s art_time Start time of the ad_event in Universal Time, Co-ordinated ("UTC”), and Modified Julian Date (“MJD”), each of which is described in the DVB standard.
• ad_duration Duration of the ad_event in hours, minutes, and seconds as described in the EIT section of the DVB standard.
• ad_service_id Differentiates the advertisement service from any other service within the transport stream that carries the advertisement content.
• ad_transport_id Differentiates the advertisement transport_stream, about which the advertisement table provides information, from other multiplex in the delivery system.
• ad__original_network_id Identifies the network_id of the originating delivery system carrying the advertisement service.
• Every interface unit receives the above-described advertisement map table, but may be configured to store only the part of the table that corresponds to its stored advertisement preference categories and language preferences. For interface units that do not have viewer-chosen preferences, default preferences may be applied. Thus, for example, an interface unit that has the Italian language set as its preference, need not store the portions of the advertisement map table that does not describe the advertisement mapping for the Italian language. As described herein, once the advertisement map table is made available to the interface units, the interface units will have the ability to automatically keep track of the times at which the DVB service channel parameters should be changed to automatically present advertisements from the advertisement channel to the viewer, and when the parameters should be restored to their original values.

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• 1997
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